The Guardian's environment editor Fiona Harvey reveals that journalists were uninvited to a major report launch at the Natural History Museum, which was expected to come from the government's environment department and the joint intelligence committee.
Harvey had been told that the report would cover climate and biodiversity threats to the UK's national security, but it ultimately did not materialise.
Fiona Harvey shares what she has discovered about the contents of the report, while Lt Gen Richard Nugee discusses the risks the climate crisis poses to UK security.